How to find objects without UVs?
Ben Morrison offered this solution (specific to blender2.80) for selecting objects that don't have UV here. If you know other solutions not involving scripts I'd like to know them.

import bpy

bpy.ops.object.select_all(action='DESELECT')
mesh_objects = [o for o in bpy.context.scene.objects if o.type == 'MESH']
for o in mesh_objects:
    if not o.data.uv_layers:
        o.select_set(True)